Rotary cast cutter



sept.` 3,1945.

B. L. CRYAR vROTARY cAsT CUTTER Filed March. 25, 1945 3 Sheets-Sheet 1 't INVENTOR.

BUFORD L. CRYAR ATTE RN EYS sep t.3,v1946, B. L. CRYAR- 2,406,744

,ROTARY CAST CUTTER Filed March 23, 1945 3 Sheets-Sheet? v INVENTOR. BU FORD L. c RYAR mywf@ ATTCI RN EYB Sept. 3, 1946. B. 1 cRYAR ROTARY CAST CUTTER Filed Mrch '23, 1945 3 Sheets-Sheetl 5 INVENTQR. BUFORD L. CRYAR Patented Sept. 3, 1946 UNITED STATES PATENT OFFICE ROTARY CAST CUTTER Buford L. oryar, Albertville, Ala.

Application March 23, 1945, Serial No. 584,310

3 Claims.

Y My present'invention, in its broad aspect, has reference to improvements in rotary cuttingimplements for cutting casts from persons who have been injured and a part of the body placed in a cast. I have found that'there are four primary objects to be attained, if a cast cutter is to be satisfactory, (1), the cutter and process of removal of the cast must cause a minimum of discomfort to the patient since the injured part is sensitive, (2), the chips and dust from the cast must be removed, (3), the implement must be light in weight and easily handled since otherwise, the process of cutting the cast will be clumsy and laborious and will be unduly ytiring upon both the operator and patient, and (4), the construction must be simple, sturdy, practical and efcient with no small or intricate parts likely to get out of order or become broken or deranged. My present improvement accomplishes all of thev above objects and purposes in addition to others which will be apparent from the following description and drawings, and it is pointed out that changes in form, size, shape,

materials, and construction and arrangement of v parts may be made and are within the purview of my broad inventive concept, and the scope of the appended claims. Y Q

In the drawings wherein I have illustrated a preferred form of my invention:

Figure 1 is a vertical section through theA cutter;

Figure 2 is a side elevation of the rotary cutter;

Figure 3 is a top plan view; and

Figure 4 is a fragmentary view of the face of the cutter.

The numeral I designates a, flexible shaft from a source of power (not shown) and which may be a small electric motor or the like. A side handle member 2 is bored to form a bearing for the cutter drive shaft 3 which is coupled as at 4 with the flexible shaft. A button switch 5I on the handle permits handy control of the motor (not shown). 6 which is annularly recessed as at 1 to receive the anti-frictional bearings 8 for the shaft which extends out from the end of the handle and has keyed thereto as at 9 a milled or grooved cutting wheel IIJ, on each side of which is a bearing collar II, held in place by set screws I2. The end of the shaft beyond the outer bearing collar is journalled in another anti-friction bearing I3 supported in the cap I4 attached as at I5 to a semi-circular cutting wheel housing I5 having spaced parallel side walls connected by a web and which forms a guard hood over, and

2 protects and houses more than half of the cutting wheel and is attached as at I6 to the flange I'I on the handle end 6.

Mounted within the housing I 5 is a brush I3 contacting the rotary cutter, there being a screw with a head I9 for attaching the same. Formed at the back of the housing I5 is a threaded sleeve 20 with which is engaged the threaded collar 2l of a hollow end handle 22 forming a conduit for dust, dirt and the like'and having a connection 23` to a bag or the like (not shown) for receiving the chips, dust, dirt and the like. The back of the housing I5 is extended to each side of the sleeve 2o and below the end handle 22 to which is attached as at 24 the upstanding bifurcated shank 25 of a support 2-6 which has a curved face 21 directed about the back of the cutting wheel and spaced therefrom and a flat bottom 28 to which is attached as at 29 a forwardly projecting foot 30 having upper and lower inclined faces 3l and designed to follow in the cut formed in the cast (not sho-wn) by the cutting wheel and to assist the cutting operation to the end that K the cast will be comfortably, promptly and effec- The handle has an enlarged end i to expose a part of the blade, and

tively removed.

From the foregoing, it is believed that the operation and advantages of my invention will be apparent, but it is again emphasized that interpretation of the scope of my invention should only be conclusive when made in the light of the subjoined claims.

I claim:

1. A rotary cast-cutter, comprising a rotary cutting blade, a housing for the blade, a shaft on which the blade is Xed, a side handle forming a bearing for the shaft, anti-friction bearings for the shaft, one carried by the handle and the other supported by the housing, a eXible drive shaft coupled with said shaft, a hollow end handle forming a conduit for dirt and chips and having' an outlet connection, and a foot projecting beneath the cutting blade and supported from the housing.

2. The invention as defined in claim 1 wherein the housing is less than a full circle in elevation a brush mounted in the housing and engaging the cutting blade.

3. The invention as defined in claim 1 wherein a support is mounted on the back of the housing and has a curved face following the curvature of the cutting wheel, and a bifurcated shank attached to the housing, and an elongated beveled foot attached to the support and projecting forward under and spaced from the cutting wheel.

' BUFORD L. CRYAR. 

